<?php

namespace CorpusParole\Libraries\Transcript;

use CorpusParole\Models\Document;

use EasyRdf\Literal;

use DateTime;

abstract class TranscriptConverterBase implements TranscriptConverterInterface {

    public function __construct(Document $document, $source, $creationDate = null) {

        $this->resJSON = [];

        $this->document = $document;

        $this->source = new \DOMDocument();

        $this->source->loadXML($source, LIBXML_NOCDATA|LIBXML_NOBLANKS);

        $this->creationDate = $creationDate;

        $this->mediaRefId = null;

        if(is_null($this->creationDate)) {

            $this->creationDate = (new DateTime())->format(DateTime::ATOM);

        }

    }

    public function addHeaderMeta() {

        $this->resJSON['format'] = 'http://advene.org/ns/cinelab/';

        $this->resJSON["@context"] = [

            "dc" =>  "http://purl.org/dc/elements/1.1/",

            "corpus" => "http://corpusdelaparole.huma-num.fr/ns/corpus#"

        ];

        $title = $this->getSourceTitle();

        if(is_null($title)) {

            $docTitle = $this->document->getTitle();

            if($docTitle instanceof Literal) {

                $titleLanguage = $docTitle->getLang();

                $title = $titleLanguage?[$titleLanguage => $docTitle->getValue()]:$docTitle->getValue();

            }

            elseif(!is_null($docTitle)) {

                $title = (string)$docTitle;

            }

        }

        $this->title = null;

        if(is_string($title)) {

            $this->title = $title;

        }

        elseif(is_array($title) && count($title) == 1) {

            $this->title = [ "@language" => key($title),  "@value" => current($title)];

        }

        elseif(is_array($title)) {

            $this->title = array_reduce(array_keys($title),function($res, $k) use ($title) {

                array_push($res, ["@language" => $k, "@value" => $title[$k]]);

                return $res;

            }, []);

        }

        $this->resJSON['meta'] = [

            'dc:creator' => config('corpusparole.transcript_default_creator'),

            'dc:contributor' => config('corpusparole.transcript_default_creator'),

            'dc:created' => $this->creationDate,

            'dc:modified' => $this->creationDate,

            'dc:title' => $this->title

        ];

    }

    // get document title

    public function getSourceTitle() {

        return null;

    }

    // add media

    public function buildMedias() {

        $medias = [];

        $i = 1;

        foreach($this->document->getMediaArray() as $documentMedia)

        {

            $mId = $this->document->getId()."_m$i";

            $i++;

            if(is_null($this->mediaRefId) || $documentMedia->isMaster()) {

                $this->mediaRefId = $mId;

            }

            array_push($medias, [

                'id' => $mId,

                'origin' => 0,

                'unit' => 'ms',

                'url' => $documentMedia->getUrl(),

                'meta' => [

                    'dc:duration' => $documentMedia->getExtentMs(),

                    'dc:title' => $this->title,

                    'dc:format' => $documentMedia->getFormat(),

                    'corpus:master' =>  filter_var($documentMedia->isMaster(), FILTER_VALIDATE_BOOLEAN)

                ]

            ]);

        }

        return $medias;

    }

    public function getMediaRefId() {

        return $this->mediaRefId;

    }

    public abstract function parseSource();

    // add resources

    public function buildResources() {

        return [];

    }

    // add lists

    public function buildLists() {

        return [];

    }

    // add annotation types

    public function buildAnnotationTypes() {

        return [];

    }

    // add annotations

    public abstract function buildAnnotations();

    protected function buildTextvalue($text, $language) {

        if(empty($language)) {

            return $text;

        } else {

            return ['@value' => $text, '@language' => $language];

        }

    }

    /**

     * Convert xml to json.

     * return an PHP array ready for serialization

     */

    function convertToJson() {

        $this->addHeaderMeta();

        $this->resJSON['medias'] = $this->buildMedias();

        $this->parseSource();

        $this->resJSON['resources'] = $this->buildResources();

        $this->resJSON['lists'] = $this->buildLists();

        $this->resJSON['annotation-types'] = $this->buildAnnotationTypes();

        $this->resJSON['annotations'] = $this->buildAnnotations();

        return $this->resJSON;

    }

}